#include <stdio.h>
int a=100;
void fi(void)
{
    int a=200;
    {
        int a=300;
    printf("a=%d\n",a);

    }
    printf("a=%d\n",a);
}
int main(void)
{
    fi();
    printf("a=%d\n",a);
    return 0;
}
